Air interface awakening method and device for single terminal with ultra-low power consumption

Abstract

The invention discloses an air interface awakening method and device for a single terminal under ultra-low power consumption, relates to the field of wireless communication, and aims to awaken a single specific terminal under the ultra-low power consumption requirement. According to the wake-up identifier allocated to the target terminal, the wake-up signal associated with the wake-up identifier corresponding to the target wake-up event is sent to the target terminal, so that the target terminal exits the low-power-consumption mode after receiving and checking the wake-up signal. According to the invention, different terminals are distinguished by adopting the distinctive wake-up identifiers, and for the terminal, wake-up detection can be carried out only by receiving one or a group of distinctive wake-up signals each time, so that the starting time of radio frequency during terminal detection is shortened to a great extent, the detection algorithm is simplified to a great extent, and the detection efficiency is improved. Therefore, the detection power consumption is reduced to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the field of wireless communications, and in particular to an air interface wake-up method and device for a single terminal under ultra-low power consumption. Background Art

[0002] With the development of IoT technology, IoT products have penetrated into all aspects of life, and many IoT application scenarios have strong restrictions on the power consumption of terminals. Generally speaking, in order to extend the service life as much as possible, LPWAN systems will not only reduce the current of receiving and sending data during operation, but also use the method of putting the chip into sleep mode when not working to save power. Then, in a wireless communication environment, how to wake up the terminal in sleep mode through air interface signals and restore the terminal to work has become an important research direction.

[0003] The traditional sleep wake-up solutions are as follows:

[0004] 1. A certain RF signal (or a specific signal sequence) is agreed upon as the sign to wake up the terminal. The terminal's main control module enters sleep mode, but some analog circuits are kept in a long-term detection state (detecting the agreed signal). The advantage of this method is that the structure is simple and easy to operate, but some analog circuits are always in working state, which cannot minimize the current power consumption;

[0005] 2. A specific time (or a certain time interval) is agreed upon, and a specific modulation signal (data packet) is used as a sign to wake up the terminal. The terminal device enters sleep mode before the agreed time, and powers on some circuits or processing units at the agreed time to complete the detection of the agreed signal. If the signal is not detected, the sleep cycle continues. This method reduces the power consumption of the device to a certain extent, but there are still many problems. When the paging signal is a modulation signal of a specific terminal, the accuracy of the agreed wake-up time is generally required to be relatively high. In order to start the detection process at a more precise time, the terminal device must ensure that a higher-precision timer is powered on during the sleep period, which has a certain impact on the power consumption and cost of the terminal. At the same time, the design of the wake-up signal is also a major difficulty. If the wake-up signal is designed as a modulated signal (data packet) for a specific terminal, the demodulation complexity is usually high and is generally accompanied by channel coding and decoding, which will result in a long detection time and high detection power consumption, and the overall standby power consumption of the terminal will also be increased; if the demodulation difficulty of the wake-up signal is reduced, the detection time is reduced, thereby reducing the power consumption during the monitoring period, this method generally cannot achieve the wake-up of a specific terminal, but wakes up a group of devices at a time, and then sends a specific data packet to the target terminal after waking up. This will cause a large number of non-target terminals to be forced to wake up, and these terminals will go into sleep again after discovering that they are non-target terminals, which will also increase the average power consumption of all terminals in the system. Summary of the invention

[0006] The object of the present invention is to provide an air interface wake-up method and device for a single terminal under ultra-low power consumption to wake up a single specific terminal under ultra-low power consumption requirements in order to solve all or part of the above-mentioned problems.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An air interface wake-up method for a single terminal under ultra-low power consumption requirements, comprising:

[0009] According to the wake-up identifier assigned to the target terminal, a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event is sent to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event; wherein,

[0010] Each wake-up identifier is associated with a wake-up signal; each terminal is assigned at least one wake-up identifier, and a corresponding wake-up period is configured for each assigned wake-up identifier; each of the terminals is periodically in low power consumption mode according to the wake-up period corresponding to the assigned wake-up identifier, and the time between each adjacent low power consumption mode is the scanning period for receiving the wake-up signal. After receiving the wake-up signal, an inspection is performed, and the period for entering the low power consumption mode is the wake-up period corresponding to the assigned wake-up identifier; the duration of the wake-up signal sent to the target terminal is the sum of the period of the low power consumption mode (i.e., the duration of the sleep period each time the low power consumption mode is entered) and the scanning period.

[0011] Further, the step of sending a wake-up signal associated with a wake-up identifier corresponding to a target wake-up event to a target terminal, so that the target terminal receives and verifies that the wake-up signal has passed, and then exits the low power consumption mode according to the target wake-up event, includes:

[0012] A wake-up signal associated with a wake-up identifier is sent to the target terminal, where the wake-up identifier corresponds to a target wake-up event. The wake-up identifier is a wake-up identifier or one of the wake-up identifiers assigned to the target terminal, so that the target terminal receives the wake-up signal and passes the verification, and then exits the low power consumption mode according to the target wake-up event.

[0013] Alternatively, the target terminal is assigned at least two wake-up identifiers; the sending of a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event, including:

[0014] A wake-up signal associated with a wake-up identifier is sent to the target terminal, where the wake-up identifier corresponds to a target wake-up event. The wake-up identifier is one of the wake-up identifiers assigned to the target terminal, so that the target terminal exits the low power consumption mode according to the target wake-up event after receiving the wake-up signal in the wake-up period corresponding to the wake-up identifier.

[0015] Furthermore, the target terminal scans the corresponding wake-up signal in the wake-up cycle corresponding to each allocated wake-up identifier, and after receiving the wake-up signal in any wake-up cycle and verifying that the wake-up signal is the wake-up identifier corresponding to the wake-up cycle, exits the low power consumption mode according to the target wake-up event.

[0016] Alternatively, the target terminal is assigned at least one pair of wake-up identifiers; the sending of a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event, including:

[0017] A pair of wake-up signals associated with wake-up identifiers are continuously sent to the target terminal. The extended wake-up identifier formed by the combination of the pair of wake-up identifiers corresponds to the target wake-up event. The pair of wake-up identifiers are one of the wake-up identifiers assigned to the target terminal, so that the target terminal exits the low power consumption mode according to the target wake-up event after receiving the pair of wake-up signals in two consecutive scanning periods starting from the wake-up cycle corresponding to the pair of wake-up identifiers.

[0018] Furthermore, the two wake-up signals continuously sent to the target terminal are wake-up signals respectively associated with two sub-wake-up identifiers after one wake-up identifier is split into two sub-wake-up identifiers, and the split wake-up identifiers correspond to the target wake-up event.

[0019] Alternatively, the target terminal is assigned at least two pairs of wake-up identifiers; the sending of a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event, including:

[0020] Two pairs of wake-up signals associated with a pair of wake-up identifiers are continuously sent to the target terminal, and the extended wake-up identifier formed by the pair of wake-up identifiers corresponds to the target wake-up event. The pair of wake-up identifiers are each one of the wake-up identifiers assigned to the target terminal, so that the target terminal exits the low power consumption mode according to the target wake-up event after receiving one wake-up signal of the pair of wake-up signals in the wake-up cycle corresponding to the pair of wake-up identifiers and receiving another wake-up signal of the pair of wake-up signals in a subsequent adjacent scanning period.

[0021] Furthermore, the pair of wake-up signals continuously sent to the target terminal are wake-up signals respectively associated with two sub-wake-up identifiers after a wake-up identifier corresponding to the target wake-up event is split into two sub-wake-up identifiers.

[0022] Furthermore, the wake-up signal is in a cyclic sequence format.

[0023] The present invention also provides an air interface wake-up device for a single terminal under ultra-low power consumption requirements, which includes a processor and a storage medium, wherein the storage medium stores a computer program, and the processor is configured to run the computer program in the storage medium to execute the above-mentioned air interface wake-up method for a single terminal under ultra-low power consumption requirements.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. The present invention uses a distinctive wake-up identifier to distinguish different terminals. For the terminal, it only needs to receive one or a group of distinctive wake-up signals each time to perform wake-up detection. The present invention does not involve complex demodulation and decoding, and the wake-up signal is not a complete data packet. If it is a complete data packet, the number of receiving points should generally be greater than the packet length in order to demodulate the data packet in the case of time misalignment. Therefore, the present invention uses a wake-up signal to wake up a specific single terminal, which greatly reduces the radio frequency turn-on time during terminal detection, greatly simplifies the detection algorithm, and thus minimizes the detection power consumption.

[0026] 2. This solution uses a periodic detection method for cyclic sequences for wake-up. Since the sequence itself has cyclic characteristics, and the transmitter will continue to send a cyclic sequence of duration T as a wake-up signal, the receiver only needs to periodically sleep for T duration and then receive a cyclic sequence for wake-up detection. The time accuracy requirement for the start of detection reception is extremely low. Furthermore, the clock accuracy requirement for the terminal in sleep state is low, so the terminal can retain a lower frequency clock module in sleep mode, which reduces the power consumption during sleep to a certain extent.

[0027] 3. In order to achieve the ultimate power consumption and ultimate cost, the terminal devices in the LPWAN system generally use passive crystals with lower power consumption and lower price as the main clock. During the operation of the terminal, the frequency can be calibrated by methods such as long-term signal tracking to compensate for the frequency deviation caused by the passive crystal oscillator. However, after hibernation, the frequency deviation of the terminal device is unknown. At this time, detecting ordinary modulated signals will bring a large amount of calculation, thereby raising the detection power consumption. The cyclic sequence of the present invention can use the ZC sequence as the wake-up signal. The advantage is that the detection of the ZC sequence is insensitive to large frequency deviations, that is, when the terminal device performs low-power wake-up detection, it can effectively judge the signal detection result through the simplest detection means;

[0028] 4. The wake-up signal in the present invention carries a wake-up identifier. By sending two sets of wake-up signals with different wake-up identifiers, the number of target terminal categories is greatly expanded, and a single terminal can be woken up in the same system. At the same time, the same terminal performs dual wake-up identifier detection, which can meet the needs of single-terminal wake-up and multi-terminal wake-up at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0030] Figure 1 is a timing diagram of wake-up mode 1 in one embodiment.

[0031] Figure 2 is a timing diagram of wake-up mode three in one embodiment. DETAILED DESCRIPTION

[0032] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0033] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0034] Example 1

[0035] An air interface wake-up method for a single terminal under ultra-low power consumption requirements, the method comprising the following steps:

[0036] According to the wake-up identifier assigned to the target terminal, a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event is sent to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event; wherein,

[0037] Each wake-up identifier is associated with a wake-up signal one by one, that is, a corresponding and unique wake-up identifier is configured for each wake-up signal. Each terminal is assigned at least one wake-up identifier, and each wake-up identifier can correspond to a wake-up event. Different terminals can be assigned different wake-up identifiers to achieve single-terminal wake-up; the same type of terminals can be assigned the same wake-up identifier to achieve group wake-up; the same terminal can be assigned different wake-up identifiers to achieve single-terminal wake-up or group wake-up. Each assigned wake-up identifier (including the wake-up identifier as an extended wake-up identifier) ​​is respectively configured with a corresponding wake-up cycle, and each terminal is periodically in low power consumption mode according to the wake-up cycle corresponding to the assigned wake-up identifier, that is, sleeps for a period of time, then wakes up briefly to scan the wake-up signal, and then sleeps again for a period of time, wakes up again to scan the wake-up signal, and so on. The wake-up cycle of the sub-wake-up identifier is the same as the wake-up cycle of the extended identifier. Usually, the wake-up cycles between different wake-up identifiers are either the same or multiples, so that the terminal can sleep periodically according to the highest frequency wake-up cycle. The time between each adjacent low power mode, that is, the time from each short wake-up to scan the wake-up signal to sleep again, is the scanning period for receiving the wake-up signal, that is, the period of short wake-up is called the scanning period. The wake-up signal is scanned during the scanning period, and the scanned wake-up signal is received at the same time. After receiving the wake-up signal, a test is performed to check whether the received wake-up signal is to wake itself up. The period for entering the low power mode is the wake-up period corresponding to the assigned wake-up identifier. It should be noted that if the terminal is assigned with multiple wake-up identifiers, the terminal needs to execute the wake-up period corresponding to each wake-up identifier. Of course, the wake-up periods of different wake-up identifiers are usually multiples, even if they are different. Therefore, the terminal usually performs the scan of the wake-up signal according to the wake-up period with the highest frequency. The duration of the wake-up signal sent to the target terminal is the sum of the period of the low power mode and the scanning period, so that once the wake-up signal is sent, the target terminal has enough time to receive the wake-up signal in the most recent scanning period.

[0038] According to an embodiment of the present application, the basic design ideas of the air interface wake-up method for a single terminal under ultra-low power consumption include:

[0039] 1. Select the signal format as the wake-up signal.

[0040] In some embodiments, a cyclic sequence is used as the format of the wake-up signal, which has a cyclic feature, so that the wake-up signal does not need to be complexly demodulated and decoded, which can greatly reduce the RF turn-on time during terminal detection, simplify the detection algorithm, and reduce the terminal's requirements for the accuracy of the reception start time, thereby minimizing the detection power consumption.

[0041] In some embodiments, a cyclic sequence in the ZC (Zadoff-Chu) sequence format is used as the format of the wake-up signal. The ZC sequence expression is: Where N is the sequence length, u is the root index, u∈[1,N]. Therefore, according to the different values ​​of u, N different ZC sequences can be obtained, and the value of u is used as the key to distinguish different terminals. In other words, the value of u determines the value of the subsequent wake-up flag.

[0042] 2. Define the wake-up flag.

[0043] The wake-up identifier is determined as a distinguishing identifier for different wake-up signals, that is, the wake-up identifier can be defined as the number of different wake-up signals, and each wake-up identifier is associated with each wake-up signal one by one. In addition, different wake-up identifiers are also used as marks to distinguish different wake-up events, which have been agreed and allocated before the terminal enters the low-power mode. Different terminals can be assigned different wake-up identifiers to achieve single-terminal wake-up; the same type of terminals can be assigned the same wake-up identifier to achieve group wake-up; the same terminal can be assigned different wake-up identifiers to support different wake-up events to achieve wake-up by a single terminal or wake-up by a group.

[0044] 3. Set the wake-up cycle.

[0045] Different wake-up flags are configured with the same or different wake-up periods, and corresponding wake-up signals are sent according to different wake-up periods.

[0046] 4. When the target terminal needs to be awakened, a wake-up signal of duration T associated with the corresponding wake-up flag is sent to the target terminal. T is the sum of the period of the terminal entering the low power mode and the scanning period, that is, the time difference between two consecutive entry / exit of the low power mode. In practice, considering the frequency deviation of the terminal crystal oscillator, the length of the wake-up signal will be slightly longer than T, such as adding a period or a certain proportion of the period on the basis of T.

[0047] 5. The target terminal will periodically enter the low power mode. Under normal circumstances, it will enter sleep at intervals of T, that is, it will periodically enter the low power mode according to the minimum wake-up cycle. The duration of each sleep period is TM (M is the duration of the scanning period). After each sleep period, it will briefly exit the sleep period and enter the scanning period of M. At this time, it scans for wake-up signals. If a signal with a length of N*n (n represents the number of segments of the cyclic sequence) is received, it detects whether the sequence is the wake-up signal to be scanned in the current wake-up cycle, so as to decide whether to exit the low power mode, that is, it will no longer periodically enter the low power mode. If it is the wake-up signal to be scanned currently, it will exit the low power mode. If not, it will ignore the wake-up signal and continue to sleep periodically.

[0048] It should be noted that the average power consumption, number of terminals, and sensitivity requirements vary depending on the specific usage scenarios. Different scenarios can be adapted by configuring the ZC sequence length N, the number of receiving cyclic sequence segments n, the detection period T, the bandwidth, etc.

[0049] The following describes several modes for waking up the target terminal under ultra-low power consumption.

[0050] Mode 1: Single wake-up mark wake-up mode.

[0051] In this mode, only one wake-up signal associated with a wake-up identifier is sent to the target terminal each time. This wake-up identifier is a wake-up identifier corresponding to the target wake-up event. This wake-up identifier is a wake-up identifier or one of them assigned to the target terminal, so that the target terminal receives this wake-up signal and passes the test, and then exits the low power consumption mode according to the target wake-up event. The so-called pass test is to determine whether the wake-up signal is the wake-up signal to be scanned in the current wake-up cycle. Obviously, the wake-up signal to be scanned is configured in the target terminal. If it is the wake-up signal to be scanned, the test passes, otherwise the test fails.

[0052] In this embodiment and subsequent embodiments, the wake-up identifier is referred to as ID. Figure 1 As shown, after the terminal enters the low power consumption mode, it goes into sleep mode according to the set period T. After reaching the scanning period (the interval between adjacent scanning periods is the length of the sleep period), it scans the cyclic sequence of the specified ID (i.e., the wake-up identifier of this wake-up period). If the target cyclic sequence is detected, it exits sleep mode and enters the wake-up mode corresponding to the target wake-up event corresponding to the ID. Otherwise, it continues to sleep periodically and waits for the next scanning period to detect again. Figure 1 It can be seen that the sleep cycle of the terminal does not need to be aligned with the wake-up signal. As long as the detection is performed with T as the period, a specific cyclic wake-up signal can be detected.

[0053] Mode 2: Double wake-up mark wake-up mode.

[0054] In this mode, the target terminal supports more than two wake-up events, that is, the target terminal is assigned at least two wake-up identifiers. In this mode, a wake-up signal associated with a wake-up identifier is sent to the target terminal, and this wake-up identifier corresponds to the target wake-up event, that is, when the wake-up signal is detected in the corresponding wake-up cycle, the wake-up mode corresponding to the target wake-up event is entered. This wake-up identifier is one of the wake-up identifiers assigned to the target terminal, so that the target terminal exits the low power consumption mode according to the target wake-up event after receiving the wake-up signal in the wake-up cycle corresponding to the wake-up identifier. In other words, the target terminal is assigned two or more wake-up identifiers and supports two or more wake-up events. After receiving the wake-up signal to be scanned by the wake-up cycle in any wake-up cycle, the low power consumption mode is exited according to the wake-up event corresponding to the wake-up identifier of the wake-up signal.

[0055] In addition, in some embodiments, the target terminal may have different wake-up periods for different wake-up identifiers configured, for example, in an integer multiple relationship. The target terminal scans the corresponding wake-up signal in the wake-up period corresponding to each wake-up identifier, and after receiving the corresponding wake-up signal in the scanning period of any wake-up period, the target terminal exits the low power consumption mode according to the wake-up event corresponding to the wake-up identifier of the wake-up signal. Obviously, when there are more than two overlapping wake-up periods, it is necessary to scan more than two wake-up signals simultaneously in the same scanning period. Specifically, taking two wake-up identifiers as an example, the target terminal scans the cyclic sequence of the first ID in the wake-up period of the first ID, and scans the cyclic sequence of the second ID in the wake-up period of the second ID. If the two wake-up periods overlap, the cyclic sequences of the two IDs are scanned at the same time. After receiving and detecting the corresponding wake-up signal in any wake-up period, the target terminal exits the low power consumption mode according to the wake-up event corresponding to the wake-up identifier of the wake-up signal.

[0056] Mode 3: Single wake-up logo extended mode.

[0057] In this mode, the target terminal is assigned at least one pair of wake-up identifiers. In this mode, a pair of wake-up identifiers associated with the wake-up signals are continuously sent to the target terminal, and the extended wake-up identifier formed by the combination of the pair of wake-up identifiers corresponds to the target wake-up event. The pair of wake-up identifiers are both one of the wake-up identifiers assigned to the target terminal, so that the target terminal exits the low power consumption mode according to the target wake-up event after receiving the pair of wake-up signals in two consecutive scanning periods starting from the wake-up cycle corresponding to the pair of wake-up identifiers.

[0058] That is to say, one extended wake-up identifier corresponds to one wake-up event. When the target terminal passes the wake-up signals of the two wake-up identifiers under the extended wake-up identifier in two consecutive scanning periods, it exits the low power consumption mode according to the wake-up event corresponding to the extended wake-up identifier. Here, the inspection of the previous wake-up signal is mainly to see whether it matches the received wake-up cycle, and the inspection of the latter wake-up signal is mainly to see whether it is paired with the first wake-up signal.

[0059] In some embodiments, when the number of wake-up identifiers is relatively limited, this wake-up mode can be used, and the wake-up identifier is used as an extended wake-up identifier in the wake-up mode to split and utilize the limited number of wake-up identifiers. That is to say, the two wake-up signals sent continuously to the target terminal are wake-up signals respectively associated with the two sub-wake-up identifiers after one wake-up identifier is split into two sub-wake-up identifiers, and the split wake-up identifier corresponds to the target wake-up event. After the target terminal receives the wake-up signals of the two sub-wake-up identifiers in two consecutive scanning periods starting from the wake-up cycle corresponding to the split wake-up identifier, it exits the low power consumption mode according to the target wake-up event.

[0060] In some embodiments, a wake-up signal corresponding to two sub-wake-up signals and lasting for T time is continuously sent to the target terminal. After the target terminal receives the first wake-up signal in the first scanning period starting from the wake-up cycle corresponding to the two wake-up signals and receives the second wake-up signal in the next adjacent scanning period, the low power consumption mode is exited according to the wake-up event corresponding to the extended wake-up identifier composed of the wake-up identifiers corresponding to the two wake-up signals.

[0061] In the specific implementation, two sub-IDs (split from an ID corresponding to the target wake-up event) are used for cross detection. The two sub-IDs are: ID1 and ID2. The two sub-IDs form an extended ID, and the extended ID corresponds to the target wake-up event. Figure 2 As shown, the wake-up signals are a cyclic sequence of ID1 transmitted for a duration of T, and a cyclic sequence of ID2 transmitted consecutively for a duration of T. The target terminal first receives the cyclic sequence of ID1 and then the cyclic sequence of ID2 every T sleep cycle, and only exits the low power consumption mode after receiving both cyclic sequences.

[0062] Mode 4: Dual wake-up logo extended mode.

[0063] In this mode, the target terminal is assigned at least two pairs of wake-up identifiers (assuming they are X1, X2 and Y1, Y2 respectively). In this mode, two wake-up signals (assuming they are X1 and X2) associated with a pair of wake-up identifiers are sent to the target terminal, and the two wake-up signals are sent continuously. The extended wake-up identifier (i.e., X) spliced ​​from the pair of wake-up identifiers corresponds to the target wake-up event, and both wake-up identifiers are one of the wake-up identifiers assigned to the target terminal, so that the target terminal receives a wake-up signal (i.e., X1) in the wake-up cycle corresponding to the pair of wake-up identifiers, and after receiving a wake-up signal (i.e., X2) paired with the received wake-up signal (i.e., X1) in the adjacent scanning period, it exits the low power consumption mode according to the wake-up event corresponding to X.

[0064] Similarly, in some embodiments, the mode can also be an extended application on a limited number of wake-up identifiers, that is, the wake-up identifier is used as its extended wake-up identifier. That is, a pair of wake-up signals continuously sent to the target terminal are wake-up signals associated with the two sub-wake-up identifiers after splitting a wake-up identifier corresponding to the target wake-up event into two sub-wake-up identifiers.

[0065] Taking the configuration of two pairs of IDs in the target terminal as an example, the extended IDs corresponding to the two pairs of IDs are called the first ID and the second ID. In the specific implementation, the target terminal detects the cyclic sequence of the second sub-ID of the first / second ID in the wake-up cycle of the first / second ID on the basis of detecting the cyclic sequence of the first sub-ID of the first / second ID. The wake-up cycle of the first ID is the highest frequency wake-up cycle, and the wake-up cycle of the second ID is an integer multiple of the first ID. Then the target terminal receives and detects the cyclic sequence of the first sub-ID or the second sub-ID of the first ID in each scanning period; receives and detects the cyclic sequence of the first sub-ID of the second ID once every integer multiple of cycles (if more pairs of IDs are allocated, more cyclic sequences of sub-IDs are detected in more wake-up cycles), and receives and detects the cyclic sequence of the second sub-ID of the second ID in the next adjacent scanning period; if the cyclic sequence of the two sub-IDs of the first ID is detected in two consecutive scanning periods, the low power consumption mode is exited according to the wake-up event corresponding to the first ID, or if the cyclic sequence of the two sub-IDs of the second ID is detected in two consecutive scanning periods, the low power consumption mode is exited according to the wake-up event corresponding to the second ID. That is, if a cyclic sequence of two sub-IDs of the first ID is detected in two adjacent scanning periods, or a cyclic sequence of two sub-IDs of the second ID is detected, the low power consumption mode is exited according to the wake-up event corresponding to the corresponding ID.

[0066] For the embodiment of waking up the target terminal using two consecutive wake-up signals (such as mode three or mode four), in practice, because the length of the wake-up signal is slightly longer than T, in order to successfully detect the second wake-up signal in the next scanning period after detecting the first wake-up signal, the target terminal increases the next sleep duration by M after detecting the first wake-up signal, that is, the cycle of the next low-power mode increases by the length of a scanning period. In this way, after detecting the first wake-up signal, the second wake-up signal will inevitably be scanned in the next scanning period. If the second wake-up signal is detected in the next scanning period, the low-power mode is exited corresponding to the target wake-up event. If the second wake-up signal is not detected in the next scanning period, and the first wake-up signal is not detected, the original sleep duration (TM) is restored. If the first wake-up signal is detected in the next scanning period, the sleep duration T is maintained, and the second wake-up signal is scanned in the next scanning period, and this cycle is repeated.

[0067] For the above embodiment using the ZC sequence as the cyclic sequence format, the corresponding sequence length can be selected from several different configurations [127, 251, 509, 1021].

[0068] In addition, for the embodiments in which the wake-up flag is not extended in mode 1 and mode 2, the optional number of wake-up flags is one of [32, 64, 128, 256] (not all u value options are selected as wake-up signals). In the embodiments in which the wake-up flag is extended in mode 3 and mode 4, the optional number of wake-up flags is one of [32*32-1, 64*64-1, 128*128-1, 256*256-1], that is, [1023, 4095, 16383, 65535]. After testing, these embodiments perform well in the WIoTA communication system.

[0069] Taking the above embodiment as an example, mode 3 and mode 4 split the wake-up ID into 2 sub-IDs, and take 5, 6, 7 or 8 bits of data at the front and back to form a sub-ID (the length of the wake-up ID is 10, 12, 14 or 16 bits), that is, the wake-up ID is split into two sub-IDs with the same length at the front and back. For example, if the ID under the symbol 128 configuration is 367, its binary value is 0b0101101111, and the ID is split into 0b01011 and 0b01111, that is, two sub-IDs 11 and 15; if the wake-up ID under the symbol 512 configuration is 14276, its binary value is 0b11011111000100, and the ID is split into 0b1101111 and 0b1000100, that is, two sub-IDs 111 and 68, and the same applies to other configurations.

[0070] For example, at the sender of the wake-up signal, by sending a cyclic sequence of a specific ID, such as the ZC sequence mentioned above, in mode 1, the duration of the transmission is the length of the sleep cycle configured by the ID to be awakened. For example, the sleep cycle of the target terminal with ID 16 is 1s, so the length of the wake-up signal sent by the sender is 1s. If the second ID needs to be used for wake-up in mode 2, and its detection cycle is twice that of the first ID, that is, 2s, then the signal length of the sender should be 2s.

[0071] If it is mode 3 or mode 4, since each awakened ID is split into two sub-IDs, assuming that the two sub-IDs are 16 and 15, and the sleep period of the target terminal is 1s, for mode 3, the transmitter continuously sends ZC sequences of sub-IDs 16 and 15 for 1s each, and no interval is required for switching between sub-IDs. If it is mode 4, and the detection period of the second ID is twice that of the first ID, the transmitter also continuously sends ZC sequences of the two sub-IDs split from the second ID for 2s each.

[0072] For the target terminal, for mode 1, only the ZC sequence of one ID is detected, assuming it is A. Then the target terminal must detect A every time it wakes up, and exits the low power consumption mode if A is detected.

[0073] For mode 2, the target terminal needs to detect the ZC sequences of two IDs, assuming they are A and B, and detect B every n scanning periods. Then the target terminal needs to detect A in each scanning period. If the number of scanning periods mod n = 0 (that is, the modulus of n, indicating that the wake-up cycle of B has been reached), B must be detected at the same time. At this time, if any ZC sequence of A and B is detected, the low power consumption mode will be exited. It should be noted that if A is detected, the device will be awakened by the wake-up event corresponding to A, and if B is detected, the device will be awakened by the wake-up event corresponding to B. The same applies to mode 4 below.

[0074] For mode three, although only one ID is detected, the ID needs to be split. Assuming that the ID is A, the cyclic sequences of the two sub-IDs split bit by bit are A1 and A2 respectively. A1 is detected first in each scanning period. When A1 is detected to be valid, A2 is detected in the next scanning period. If A2 is detected successfully, the low power consumption mode is exited according to the wake-up event corresponding to A (that is, the extended ID spliced ​​by the two sub-IDs in the scanning order). If A2 detection fails, the sleep cycle continues and A1 is re-detected in the next scanning period.

[0075] For mode 4, two IDs need to be detected, and both IDs need to be split. The two IDs are assumed to be A and B. The cyclic sequences after each split are divided into A1 and A2, B1 and B2. B needs to be detected in every n scanning periods, so the target terminal detects A1 in each scanning period. If the number of scanning periods mod n=0, B1 should be detected at the same time; when A1 is detected, A2 is detected again, or when B1 is detected, B2 is detected again. If A2 or B2 is detected successfully, the low power consumption mode is exited according to the wake-up event corresponding to A or B (that is, the extended ID spliced ​​by A1 and A2 or B1 and B2). If both fail, the cyclic sleep continues, and A1 continues to be detected in the next scanning period. B1 is detected at the same time when the cycle of detecting B is reached, and the same applies thereafter.

[0076] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. An air interface wake-up method for a single terminal under ultra-low power consumption requirements, characterized in that: include: According to the wake-up identifier assigned to the target terminal, a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event is sent to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event; wherein, Each wake-up identifier is associated with a wake-up signal; each terminal is assigned at least one wake-up identifier, and each assigned wake-up identifier is configured with a corresponding wake-up period; each of the terminals is periodically in a low power consumption mode according to the wake-up period corresponding to the assigned wake-up identifier, and the time between each adjacent low power consumption mode is a scanning period for receiving the wake-up signal, and an inspection is performed after receiving the wake-up signal; the period for entering the low power consumption mode is the wake-up period corresponding to the assigned wake-up identifier; the duration of the wake-up signal sent to the target terminal is the sum of the period of the low power consumption mode and the scanning period.

2. The air interface wake-up method for a single terminal under ultra-low power consumption requirements as claimed in claim 1, characterized in that: The step of sending a wake-up signal associated with a wake-up identifier corresponding to a target wake-up event to a target terminal, so that the target terminal receives and verifies that the wake-up signal has passed, and then exits a low power consumption mode according to the target wake-up event, includes: A wake-up signal associated with a wake-up identifier is sent to the target terminal, where the wake-up identifier corresponds to a target wake-up event. The wake-up identifier is a wake-up identifier or one of the wake-up identifiers assigned to the target terminal, so that the target terminal receives the wake-up signal and passes the verification, and then exits the low power consumption mode according to the target wake-up event.

3. The air interface wake-up method for a single terminal under ultra-low power consumption requirements as claimed in claim 1, characterized in that: The target terminal is assigned at least two wake-up identifiers; the sending of a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event, including: A wake-up signal associated with a wake-up identifier is sent to the target terminal, where the wake-up identifier corresponds to a target wake-up event. The wake-up identifier is one of the wake-up identifiers assigned to the target terminal, so that the target terminal exits the low power consumption mode according to the target wake-up event after receiving the wake-up signal in the wake-up period corresponding to the wake-up identifier.

4. The air interface wake-up method for a single terminal under ultra-low power consumption requirements according to claim 3, characterized in that: The target terminal scans the corresponding wake-up signal in the wake-up cycle corresponding to each allocated wake-up identifier, and after receiving the wake-up signal in any wake-up cycle and verifying that the wake-up signal is the wake-up identifier corresponding to the wake-up cycle, exits the low power consumption mode according to the target wake-up event.

5. The air interface wake-up method for a single terminal under ultra-low power consumption requirements as claimed in claim 1, characterized in that: The target terminal is assigned at least one pair of wake-up identifiers; the sending of a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event, including: A pair of wake-up signals associated with wake-up identifiers are continuously sent to the target terminal. The extended wake-up identifier formed by the combination of the pair of wake-up identifiers corresponds to the target wake-up event. The pair of wake-up identifiers are one of the wake-up identifiers assigned to the target terminal, so that the target terminal exits the low power consumption mode according to the target wake-up event after receiving the pair of wake-up signals in two consecutive scanning periods starting from the wake-up cycle corresponding to the pair of wake-up identifiers.

6. The air interface wake-up method for a single terminal under ultra-low power consumption requirements as claimed in claim 5, characterized in that: The two wake-up signals continuously sent to the target terminal are wake-up signals respectively associated with two sub-wake-up identifiers after one wake-up identifier is split into two sub-wake-up identifiers, and the split wake-up identifiers correspond to the target wake-up event.

7. The air interface wake-up method for a single terminal under ultra-low power consumption requirements as claimed in claim 1, characterized in that: The target terminal is assigned at least two pairs of wake-up identifiers; the sending of a wake-up signal associated with the wake-up identifier corresponding to the target wake-up event to the target terminal, so that the target terminal receives and verifies that the wake-up signal passes, and then exits the low power consumption mode according to the target wake-up event, including: Two pairs of wake-up signals associated with a pair of wake-up identifiers are continuously sent to the target terminal, and the extended wake-up identifier formed by the pair of wake-up identifiers corresponds to the target wake-up event. The pair of wake-up identifiers are each one of the wake-up identifiers assigned to the target terminal, so that the target terminal exits the low power consumption mode according to the target wake-up event after receiving one wake-up signal of the pair of wake-up signals in the wake-up cycle corresponding to the pair of wake-up identifiers and receiving another wake-up signal of the pair of wake-up signals in a subsequent adjacent scanning period.

8. The air interface wake-up method for a single terminal under ultra-low power consumption requirements as claimed in claim 7, characterized in that: The pair of wake-up signals continuously sent to the target terminal are wake-up signals respectively associated with two sub-wake-up identifiers after a wake-up identifier corresponding to the target wake-up event is split into two sub-wake-up identifiers.

9. The air interface wake-up method for a single terminal under ultra-low power consumption requirements according to any one of claims 1 to 8, characterized in that: The wake-up signal is in a cyclic sequence format.

10. An air interface wake-up device for a single terminal under ultra-low power consumption requirements, characterized in that: It includes a processor and a storage medium, wherein the storage medium stores a computer program, and the processor is configured to run the computer program in the storage medium to execute the air interface wake-up method for a single terminal under ultra-low power consumption requirements as described in any one of claims 1-9.

Images